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Displaying 34601 - 34625 of 73832

Setting standards and developing technology to aid the human identity testing community

April 1, 2006
Author(s)
John M. Butler, Michael D. Coble, Amy E. Decker, David L. Duewer, Carolyn R. Steffen, Margaret C. Kline, Janette W. Redman, Peter Vallone
Our project team at the U.S. National Institute of Standards and Technology (NIST) is funded by the National Institute of Justice (NIJ) to conduct research that benefits the human identity testing community and to create tools that enable forensic DNA

Some Improved Transition Probabilities for Neutral Carbon

April 1, 2006
Author(s)
Charlotte Fischer
An earlier paper ( Zatsarinny O and Froese Fischer C 2002 J.Phys. B: 35 4669) presented oscillator strengths for transitions from the 2p23P multiplet to high-lying excited states of carbon. The emphasis was on theaccurate prediction of energy levels

Spatial Distributions of Trapping Centers in HfO2/SiO2 Stacked Dielectrics

April 1, 2006
Author(s)
Da-Wei Heh, Eric M. Vogel, J B. Bernstein, Chadwin Yang, George A. Brown, Gennadi Bersuker, Pui-Yee Hung, Alain C. Diebold
An analysis methodology basd on charge pumping (CP) measurement was applied to extract the spatial depth profile of traps in the SiO2/HfO2 gate stacks. This analysis indicates that by changing CP measurement parameters it is possible to probe traps at

The Effect of Stress Induced Anisotropy in Patterned FeCo Thin Film Structures

April 1, 2006
Author(s)
Wonpil Yu, J A. Bain, Willard C. Uhlig, John Unguris
The usage of high moment FeCo alloys in magnetic recording heads can result in stress induced anisotropy due to the high magnetostriction constants of FeCo alloys with 30% to 50% Co. In this work, 1um thick FeCo (65% Fe, 35% Co) sheet films with a Cu

The evaluation of an autosomal SNP 12-plex assay

April 1, 2006
Author(s)
Peter M. Vallone, Amy E. Decker, Michael D. Coble, John M. Butler
SNPs have the potential to play a useful role in human identification testing. Small PCR amplicon sizes associated with SNP typing technologies make SNPs attractive for typing degraded DNA or other low copy number situations. SNP markers can be useful in

The Vapor Pressure of Mercury

April 1, 2006
Author(s)
Marcia L. Huber, Arno D. Laesecke, Daniel G. Friend
In this report, we review the available measurements of the vapor pressure of mercury and develop a new correlation for the vapor pressure of mercury that is valid from the triple point to the critical point. The equation is a Wagner-type form where the

Transport Properties of Argon at Zero Density From Viscosity-Ratio Measurements

April 1, 2006
Author(s)
E May, Michael R. Moldover, Robert F. Berg, John J. Hurly
We determined the zero-density viscosity and thermal conductivity of argon with an uncertainty of only 0.039 % in the temperature range 200 K to 400 K. Our results will improve: (1) the argon-argon interatomic potential, (2) calculated boundary-layer

Determination of Cyanide in Blood by Isotope Dilution Gas Chromatography-Mass Spectrometry

March 31, 2006
Author(s)
Karen E. Murphy, Michele M. Schantz, Therese A. Butler, Bruce A. Benner Jr, Laura J. Wood, Gregory C. Turk
A procedure based on isotope dilution gas chromatography/mass spectrometry (ID GC/MS) has been developed for the accurate and rapid determination of cyanide (CN) in whole blood. A known amount of isotopically labeled potassium cyanide (K13C15N) is added as

High-Throughput Evaluation of Restorative Dental Polymers

March 31, 2006
Author(s)
Sheng Lin-Gibson, Forrest A. Landis, Nancy J. Lin
The effects of co-monomer composition and irradiation time on material properties and cell response were determined using high-throughput and combinatorial methods. 2-Dimensional gradient samples varying in monomer composition and light exposure time were

Integer Representation of Decimal Numbers for Exact Computations

March 31, 2006
Author(s)
Javier Bernal, Christoph J. Witzgall
A scheme is presented and software is documented for representing as integers input decimal numbers that have been stored in a computer as double precision floating point numbers and for carrying out multiplications, additions and subtractions based on

Parallelism for Quantum Computation with Qudits

March 31, 2006
Author(s)
Dianne M. O'Leary
Robust quantum computation with d-level quantum systems (qudits) poses two requirements: fast, parallel quantum gates and high fidelity two-qudit gates. We first describe how to implement parallel single qudit operations. It is by now well known that any

Projections Onto Order Simplexes and Isotonic Regression

March 31, 2006
Author(s)
Anthony J. Kearsley
We begin this expository essay by reviewing with examples what a typical engineer already knows about statistics. We then consider a central question in engineering decision making, i.e., given a computer simulation of high-consequence systems, how do we

Ag/AgCl Microelectrodes with Improved Stability for Microfluidics

March 30, 2006
Author(s)
Brian J. Polk, Anna Stelzenmuller, Geraldine I. Mijares, William A. MacCrehan, Michael Gaitan
A method for fabricating Ag/AgCl planar microelectrodes for microfluidic applications is presented. Microreference electrodes enable accurate measurements with miniaturized chemical sensors but such electrodes often exhibit very limited useable lifetimes

Experience in the Exchange of Procedural Shape Models Using ISO 10303 (STEP)

March 30, 2006
Author(s)
Mike Pratt, Junhwan Kim
The international standard ISO 10303 (STEP) is being extended to permit the exchange of procedurally defined shape models, with additional parameterization and constraint information, between CAD systems. The transfer of parameterized assembly models is an

Large-angle magnetization dynamics measured by time-resolved ferromagnetic resonance

March 30, 2006
Author(s)
Thomas Gerrits, Michael Schneider, Anthony B. Kos, Thomas J. Silva
A time-resolved ferromagnetic resonance technique was used to investigate the nonlinear magnetization dynamics of a 10 nm thin Permalloy TM film in response to a sequence of large-amplitude field pulses. The magnetic field pulse sequence was set at a

One-Laser Interferometric Broadband Coherent Anti-Stokes Raman Scattering

March 30, 2006
Author(s)
T W. Kee, Hongxia (Jessica) Zhao, Marcus T. Cicerone
We introduce an interferometric technique for eliminating the nonresonant background of broadband coherent anti-Stokes Raman scattering (CARS) microscopy. CARS microscopy has been used for imaging a number of biological samples and processes, but the

Ionizing Radiation-Induced Destruction of Benzene and Dienes in Aqueous Media

March 28, 2006
Author(s)
M I. Al-Sheikhly, Dianne L. Poster, Jung-Chul An, Pedatsur Neta, Joseph Silverman, Robert E. Huie
Pulse radiolysis with spectrophotometric and conductometric detection was utilized to study the formation and reactions of radicals from benzene and dienes in aqueous solutions. The benzene OH adduct, C6H6OH, reacts with O2 (k = 3 x 108 L mol-1 s-1) in a

A Compact High Stability Optical Clock Based on Laser-Cooled Ca

March 27, 2006
Author(s)
Christopher W. Oates, Yann LeCoq, G Wilpers, Leo W. Hollberg
We report new measurements and modifications for a simple, compact, Ca atomic clock at 657 nm. External measurements were made against an independent Yb lattice optical clock via a fs-laser frequency comb. These results lead to upper limits of the Ca clock

Atom-based stabilization for laser-pumped atomic clocks

March 27, 2006
Author(s)
Vladislav Gerginov, V Shah, Svenja A. Knappe, Leo W. Hollberg, John E. Kitching
Progress towards simplification and improvement of the long-term stability of chip-scale atomic clocks is presented. The conventional technique of laser optical frequency and cell temperature control is compared with a novel technique which avoids the use
Displaying 34601 - 34625 of 73832
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